Garlic mustard has been little used in herbal medicine. The leaves and stems are antiasthmatic, antiscorbutic, antiseptic, deobstruent, diaphoretic, vermifuge and vulnerary. The leaves have been taken internally to promote sweating and to treat bronchitis, asthma and eczema. Externally, they have been used as an antiseptic poultice on ulcers etc, and are effective in relieving the itching caused by bites and stings. The leaves and stems are harvested before the plant comes into flower and they can be dried for later use. The roots are chopped up small and then heated in oil to make an ointment to rub on the chest in order to bring relief from bronchitis. The juice of the plant has an inhibitory effect on Bacillus pyocyaneum and on gram-negative bacteria of the typhoid-paratyphoid-enteritis group. The seeds have been used as a snuff to excite sneezing. Source: https://pfaf.org/